JPS5699314A - Wide angle lens of short overall length - Google Patents
Wide angle lens of short overall lengthInfo
- Publication number
- JPS5699314A JPS5699314A JP57380A JP57380A JPS5699314A JP S5699314 A JPS5699314 A JP S5699314A JP 57380 A JP57380 A JP 57380A JP 57380 A JP57380 A JP 57380A JP S5699314 A JPS5699314 A JP S5699314A
- Authority
- JP
- Japan
- Prior art keywords
- lens
- directing
- overall length
- short overall
- constitution
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Lenses (AREA)
Abstract
PURPOSE: To obtain a lens of a short overall length and good aberration correction by forming a lens system of 5-group constitution in a manner as to satisfy prescribed conditions.
CONSTITUTION: The 1st lens is positive meniscus directing its convex face to the object side, the 2nd lens is negative, the 3rd lens is biconvex, the 4th lens is negative meniscus directing its strong concave face to the object side and the 5th lens is positive meniscus directing is convex face to the image side, and these are formed into a lens system of 5-group constitution. When the focal length of the entire sytem is defined as (f), the combined focal length of the 1stW3rd lenses f123 and the air space between the 3rd and 4th lenses d6, the conditions of the formulas I and II are satisfied. Thereby, the photographic lens which is about F:5.6 in brightness, is short in the overall lens length including back focus and is good in aberration correction is obtained.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP57380A JPS5699314A (en) | 1980-01-09 | 1980-01-09 | Wide angle lens of short overall length |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP57380A JPS5699314A (en) | 1980-01-09 | 1980-01-09 | Wide angle lens of short overall length |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5699314A true JPS5699314A (en) | 1981-08-10 |
Family
ID=11477448
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP57380A Pending JPS5699314A (en) | 1980-01-09 | 1980-01-09 | Wide angle lens of short overall length |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5699314A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5833211A (en) * | 1981-08-21 | 1983-02-26 | Canon Inc | Small-sized photographic lens |
US4787721A (en) * | 1984-08-18 | 1988-11-29 | Minolta Camera Kabushiki Kaisha | Photographic lens system |
JP2018116241A (en) * | 2017-01-20 | 2018-07-26 | カンタツ株式会社 | Imaging lens |
KR20180122915A (en) * | 2017-05-04 | 2018-11-14 | 삼성전기주식회사 | Optical Imaging System |
-
1980
- 1980-01-09 JP JP57380A patent/JPS5699314A/en active Pending
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5833211A (en) * | 1981-08-21 | 1983-02-26 | Canon Inc | Small-sized photographic lens |
US4787721A (en) * | 1984-08-18 | 1988-11-29 | Minolta Camera Kabushiki Kaisha | Photographic lens system |
JP2018116241A (en) * | 2017-01-20 | 2018-07-26 | カンタツ株式会社 | Imaging lens |
CN108333715A (en) * | 2017-01-20 | 2018-07-27 | 康达智株式会社 | Pick-up lens |
US10809494B2 (en) | 2017-01-20 | 2020-10-20 | Kantatsu Co., Ltd. | Imaging lens |
US11774720B2 (en) | 2017-01-20 | 2023-10-03 | Tokyo Visionary Optics Co., Ltd. | Imaging lens |
KR20180122915A (en) * | 2017-05-04 | 2018-11-14 | 삼성전기주식회사 | Optical Imaging System |
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